Thank you, Run Ann Arbor, for mentioning Mr. Excitement: Jackie Wilson. He is buried in a Westland, Michigan, cemetery, just up Michigan Avenue from Ann Arbor.
To me, part of what makes someone great is the influence they've had on others who have come after them.
Good God young people! There are recordings of most of the great singers we've had in the last 90 years or so--go listen to them. If you think Axel Rose, with his 3 hit songs ranks above Robert Plant or Freddy Mercury, or if you think Kurt Cobain, with his 3 hits, also deserves a spot on this list, show some respect! You can have a favorite, but that doesn't mean he deserves a top-10 listing.
It would take at least a day to whittle down a decent list.